HI-1570

bus To minimize the package size for this function of HI-1570, the transmitter outputs are internally connected to the receiver inputs so that only two pins are required for connection to each coupling transformer. For designs requiring independent access to transmitter and receiver 1553 signals, please contact your Holt Sales representative.

The HI-1570 is a low power CMOS dual +5V transceiver with the ability to vary the amplitude of the transmitter outputs. It is designed to meet the requirements of the MIL-STD-1553 / 1760 specifications.

The transmitter section of each channel takes complementary CMOS / TTL digital input data and converts it to bi-phase Manchester encoded 1553 signals suitable for driving the bus isolation transformer. Separate transmitter inhibit control signals are provided for each transmitter. A single pin of HI-1570 allows the user to control the transmitter output amplitude.

The receiver section of each channel converts the 1553 bi-phase data to complementary CMOS / TTL data suitable for inputting to a Manchester decoder. Each receiver HI-1570 has a separate enable input which can be used to force the output of the receiver to a logic "0".